The Fluke Networks can wrenches feature color-coded socket ends and built-in ribs on the barrel for user comfort, safety, and greater torque power. The two hex head sockets (7/16 inch and 3/8 inch) have reduced outside diameters that fit all new network interface devices. The 7/16 inch is black oxidized to easily distinguish it from the 3/8 inch zinc-plated socket end.